Foundations · Article 01

History of Baking

A reference article · 4,500 words · 25 cited sources · last reviewed August 2026

This article traces baking's long braid: the botanical evolution of grains, the mechanics of milling, the microbiology of leaven, and the social history of the people who baked.

Baking, the transformation of ground plant starches and water into leavened or unleavened food through the application of dry heat, is among humanity’s oldest and most consequential technologies. Its history is not a tidy linear march but a braid of parallel developments: the botanical evolution of grains, the mechanical evolution of milling, the microbiological accident of fermentation, and the social evolution of the people who baked. What follows traces that braid chronologically where the record allows and thematically where it does not, flagging contested dates throughout.

Prehistory and origins: bread before agriculture

A major recent revision to baking history is that bread predates farming. In 2018, a team led by Amaia Arranz-Otaegui and Lara González Carretero reported charred food remains from Shubayqa 1, a Natufian hunter-gatherer site in northeastern Jordan, radiocarbon-dated to roughly 14,400 years ago, some four millennia before the domestication of cereals (Arranz-Otaegui et al., PNAS, 2018). Analyzed by scanning electron microscopy, the crumbs proved to be a flatbread-like product made from wild cereals (einkorn-type wheat, barley, oats) and tubers of club-rush, ground and baked in or beside fireplaces. The finding demonstrates that people were gathering wild grasses, grinding them, and baking well before they cultivated them, inverting the old assumption that farming came first and bread followed. The authors even suggest the labor-intensive appeal of bread may have been one motivation for the later adoption of agriculture, though this causal claim remains speculative (Arranz-Otaegui et al., 2018).

The material culture supporting this is older still. Ground-stone tools (grinding slabs, handstones, and mortars used to process seeds) appear at Upper Paleolithic sites, and starch-grain residues on a grinding stone from Bilancino (Italy), and comparable finds at Kostenki (Russia) and Pavlov VI (Czech Republic), push evidence of cereal-grass flour production back to roughly 30,000 years ago (Revedin et al., PNAS, 2010). Not all of this flour was necessarily baked into bread, but it establishes a deep prehistory of grinding and gruel-making from which baking emerged. The broad arc is clear: gathering wild grass seeds → grinding them to meal → mixing with water → cooking the paste on hot stones or ash. That sequence was in place among the Natufians of the Levant during the climatic upheavals that closed the last Ice Age, and it positioned these societies for the deliberate cultivation to come.

Grain domestication: the Fertile Crescent and the wheat genome

Systematic cereal cultivation began in the Fertile Crescent during the early Holocene, roughly 10,000–9,500 BCE (the Pre-Pottery Neolithic). The founder crops included two wild wheats, einkorn (Triticum monococcum) and emmer (T. dicoccum), alongside barley (Hordeum vulgare), plus pulses and flax. Domestication is archaeologically visible in the shift from brittle wild seed heads (which shatter to self-sow) to tough, non-shattering rachises that hold the grain for human harvest, a change that took centuries to millennia of selection (Zohary, Hopf & Weiss, Domestication of Plants in the Old World, 2012).

The genetics of wheat are central to baking because they explain why bread wheat behaves as it does. Wheats form a polyploid series:

• Einkorn is diploid (two genome sets, AA), the oldest domesticated wheat; recent genome work confirms its ancient roots and complex domestication history (Ahmed et al., Nature, 2023).
• Emmer is tetraploid (AABB), arising from a natural hybridization between a wild diploid wheat (the A genome) and a species related to Aegilops speltoides (the B genome).
• Bread wheat is hexaploid (T. aestivum, AABBDD). It emerged only after farming began, when cultivated tetraploid emmer hybridized with the wild goatgrass Aegilops tauschii, contributing the D genome, an event dated to roughly 8,000–9,000 years ago in the region south of the Caspian Sea (Ahmed et al., Frontiers in Genetics, 2022; Wang et al., Nature Biotechnology, 2021).

That D genome matters enormously: it carries gluten-forming glutenin and gliadin alleles that give bread-wheat doughs their superior gas-holding elasticity, making light, high-rising loaves possible in a way einkorn and emmer doughs are not. Spelt (T. spelta) is another hexaploid, a hulled relative that spread through Neolithic and Bronze Age Europe. Barley, meanwhile, more tolerant of poor soils and salinity but low in gluten, dominated in many early societies for porridge, flatbread, and, crucially, beer. So the “bread” grain par excellence is an accidental post-agricultural hybrid rather than a wild plant humans first gathered.

Ancient civilizations: Egypt, Mesopotamia, Greece, Rome

Mesopotamia and the Near East. Sumerian and Akkadian records document barley and emmer as staples, ground on saddle querns and baked as flatbreads or against the walls of clay ovens (a technique surviving today as the tandoor/tannur). Bread and beer were the twin pillars of the ration economy; workers were literally paid in loaves and beer jars.

Egypt is where the documentary and archaeological record becomes rich, and where leavening enters the story most vividly. Egyptian bakers worked chiefly with emmer, and by the third and second millennia BCE they operated dedicated, large-scale bakeries. Tomb paintings and wooden funerary models (notably from the Middle Kingdom) depict the full sequence of grinding, sieving, kneading, shaping, and baking in conical clay bread-moulds (bedja) heated in the fire. At the Giza pyramid town, excavations by Mark Lehner and the AERA team uncovered industrial-scale bakeries that helped feed the pyramid-building workforce, with rows of bread-pots and vats indicating bulk production (Lehner, AERA “Feeding Pyramid Workers”). Egypt is traditionally credited with the popularization of leavened bread, and the bread–beer nexus is intimate: both depend on the same Saccharomyces fermentation, both use the same grains, and the technologies plausibly cross-fertilized. The old textbook tale that a distracted Egyptian baker “discovered” leavening by leaving dough out is a just-so story; what the evidence supports is that in a grain-and-beer economy, wild-yeast fermentation of dough would have been discovered repeatedly and then deliberately maintained (Samuel, “Investigation of Ancient Egyptian Baking and Brewing,” Science, 1996; Delwen Samuel’s microscopy of ancient loaf remains).

Greece. By the Classical and Hellenistic periods, Greek cities supported public bakeries and a notable variety of breads. Ancient authors, above all Athenaeus in the Deipnosophistae (c. 200 CE, compiling earlier sources), catalogue dozens of named breads distinguished by grain, leavening, shape, and additions (honey, oil, cheese). The Greeks improved oven design (the front-loading, enclosed klibanos/ipnos) and elevated baking toward a craft, and Athens is often credited with commercializing bakeries as retail establishments.

Rome industrialized and professionalized baking to a degree not seen again for over a thousand years. The professional baker was the pistor (from pinsere, “to pound,” a nod to the origins in grain-crushing). According to Pliny the Elder, commercial bakers appeared in Rome relatively late, around 168 BCE, after the wars in the East, and thereafter multiplied rapidly (Pliny, Natural History, Book 18). Bakers organized into a guild-like collegium of pistores, and under the Empire the trade became semi-hereditary and closely regulated because bread supply was politically explosive (the annona grain dole underwrote the “bread and circuses” social contract). Roman engineering delivered the rotary quern and the large hourglass-shaped animal- and slave-powered mills (mola asinaria), and eventually water-powered mills: the spectacular Barbegal complex near Arles (2nd century CE) ran sixteen overshot wheels in a milling factory. The Tomb of Eurysaces the Baker (c. 50–20 BCE) in Rome, a freedman who grew wealthy as a baking contractor, survives as a monument to the trade, its frieze depicting each stage of production. And at Pompeii and Herculaneum, volcanic burial in 79 CE froze the evidence: intact bakeries (pistrina) such as that of Modestus, with their lava-stone mills, kneading machines, and ovens, one of which yielded carbonized round loaves scored into eight segments, the panis quadratus, some even stamped with the baker’s name (Pompeii archaeological record; Monteix, Les lieux de métier, 2016). “Panis”, bread, was so central that Rome’s whole urban order rested on it.

Leavening history: the long reign of natural leaven

For most of baking’s history, all raised bread was sourdough. Leavening was not understood mechanistically. The microbiology of yeast (Saccharomyces cerevisiae) and lactic-acid bacteria (Lactobacillus and relatives) would not be described until Louis Pasteur’s work in the 1850s–1860s. But it was mastered empirically. A flour-and-water paste left in a warm place spontaneously ferments as wild yeasts and bacteria from the flour, air, and environment colonize it; a portion of yesterday’s active dough, saved and refreshed, becomes a perpetual starter or “mother.” This is the original leaven, in continuous use from ancient Egypt onward.

A parallel and eventually dominant source of leavening in brewing cultures was ale-barm, the yeasty foam skimmed from fermenting beer. In medieval and early-modern Northern Europe, where ale was a daily staple, barm-leavened bread was common and prized for its lighter, less sour crumb; the very word “leaven” and phrases like “godisgood” (a brewer’s term for barm) survive from this era. But barm was perishable and variable, and sourdough remained the reliable workhorse, especially for rye. The dominance of natural leaven (sourdough plus barm) lasted essentially until the industrial production of purified baker’s yeast in the later 19th century (see the section on industrialization). Rye in particular requires an acidic sourdough to bake well: its pentosans and enzymes make rye dough behave poorly unless acidified, which is why the rye belt of Northern and Eastern Europe is also the classic sourdough belt.

Medieval Europe: guilds, the assize, and the politics of the loaf

In medieval Europe bread was the staple, often supplying the majority of caloric intake, and its production was correspondingly regulated. Bakers’ guilds emerged across European towns from the 12th–13th centuries, controlling entry to the trade, standards, and prices. In England, the Crown fixed the terms of trade through the Assize of Bread and Ale, conventionally dated to 1266 (51 Henry III), one of the earliest English statutes to regulate the production and sale of a foodstuff. Rather than fixing price, it fixed the weight of the loaf relative to the price of grain: as wheat prices rose or fell, the legal weight of a farthing or penny loaf adjusted, so bread stayed affordable while bakers’ margins were policed (Assize of Bread and Ale; Davis, Medieval Market Morality, 2012). Penalties for short-weight loaves were severe (pillory, fines), and the folk etymology of the “baker’s dozen” (throwing in a 13th loaf to avoid prosecution for underweight) descends from exactly this regime, though that specific origin story is traditional rather than firmly documented.

Bread was also a class marker. White bread made from finely bolted (sieved) wheat flour, pandemain or manchet, was expensive and associated with the wealthy, because removing the bran wasted flour and demanded fine milling and sieving. The poor ate darker, coarser breads: whole-meal wheat, “maslin” (mixed wheat-and-rye), rye, barley, or in dearth even legume- and acorn-adulterated loaves. At the table, day-old coarse bread was sliced into trenchers, edible plates that soaked up juices and were afterward eaten, given to servants, or handed to the poor. Baking itself was frequently communal: on many manors the lord operated a monopoly banal oven (four banal), and tenants were obliged, for a fee, to bake their bread there rather than in private ovens, both a revenue device and a fire-safety measure in timber towns. This manorial oven monopoly persisted in parts of France until the Revolution.

Milling evolution: from quern to roller mill

The character of bread has always been governed by how grain is milled. The earliest tool was the saddle quern, a handstone rubbed against a stone slab, later joined by the rotary quern (a turning upper stone on a fixed lower one), a major Iron Age efficiency gain. Rotary power scaled up through animal-powered mills and then watermills, which the Romans deployed and which spread widely across early-medieval Europe (the Domesday Book of 1086 records some 6,000 watermills in England). The windmill arrived in Europe in the late 12th century, opening milling to regions without reliable falling water. All these were stone mills (millstones), which crush grain and mix bran, germ, and endosperm together; to make white flour, the meal then had to be laboriously bolted (sieved through cloth), and even then retained some bran and the oil-rich germ.

The decisive rupture came with roller milling. Developed and refined in Central Europe, with Hungary (Budapest/Pest) a leading center in the mid-19th century drawing on Swiss engineering (Sulzberger, Wegmann), the gradual-reduction roller-milling system used successive pairs of chilled steel (later porcelain) rollers to shear grain open, combined with sifting (purifiers) between passes. It reached large-scale commercial adoption in Britain and the United States in the 1870s–1880s (roller-milled white flour). Roller milling did two transformative things: it made cheap, uniform white flour available to the masses for the first time, democratizing the white bread that had been an elite privilege; and it made possible the near-total, mechanized removal of bran and germ. That was a commercial and keeping advantage (germ oil goes rancid, so germ-free flour stores far longer), but a nutritional loss, stripping out fiber, B vitamins, vitamin E, and minerals. The consequences were serious enough that 20th-century governments mandated enrichment (adding back thiamine, riboflavin, niacin, iron, later folic acid), in the U.S. from the early 1940s, in wartime Britain via the “National Loaf”, to combat deficiency diseases that white-flour diets had aggravated (see the industrialization section).

Sugar, spice, and the rise of pastry

Baking’s sweet branch, pastry and confectionery, developed on a different track, gated by the availability of sugar. Through the Middle Ages sugar was a rare, medicinal luxury imported from the Islamic world; honey and dried fruit did most sweetening. The spice trade and the medieval Arab confectionery tradition (which gave Europe candied fruits, marzipan, and syrup-based sweets) seeded European skills. The catastrophic engine of change was the Atlantic sugar-plantation economy from the 16th–18th centuries: Caribbean and Brazilian plantations, worked by enslaved Africans, drove sugar’s price down and consumption up, moving it from apothecary to pantry (Mintz, Sweetness and Power, 1985). Cheap sugar made cakes, sweetened pastries, and confectionery everyday possibilities.

The craft crystallized in France. Medieval and Renaissance guilds had already divided the trades: in Paris the pâtissiers (pastry cooks) were incorporated as a distinct guild by the mid-15th century, separate from bakers (boulangers) and wafer-makers (oublayeurs). Enriched, laminated, and sugar-worked doughs, such as puff pastry (pâte feuilletée), choux, and brioche, were codified over the 17th and 18th centuries. The figure who systematized pâtisserie into an architectural art was Marie-Antoine (Antonin) Carême (1784–1833), the “cook of kings and king of cooks,” whose treatises (Le Pâtissier royal parisien, 1815) elevated pastry to spectacular pièces montées and imposed method and classification. Later in the century Georges Auguste Escoffier (1846–1935) rationalized the professional kitchen brigade and, with Le Guide Culinaire (1903), fixed the modern canon of French cuisine and pastry: the codified base recipes (crèmes, doughs, mother sauces’ sweet analogues) that still underpin professional patisserie training. French pâtisserie thus became, and remains, the reference grammar of Western baking’s fine end.

The chemical leavening revolution

For all of baking history before the 1800s, raising dough meant biology (yeast, barm) or mechanics (beaten eggs, steam). The 19th century introduced chemical leavening, reactions that release carbon dioxide fast, without fermentation, and transformed home baking. The sequence:

• Pearlash (refined potash, potassium carbonate), leached from wood ash, was used in North America from the late 18th century: the first American cookbook, Amelia Simmons’s American Cookery (1796), already calls for it. It reacts with acidic batter ingredients to give off gas.
• Saleratus (“aerated salt,” potassium or sodium bicarbonate) followed in the early-mid 19th century, and then purified baking soda (sodium bicarbonate) became a household staple. Soda needs an acid (sour milk, buttermilk, molasses, vinegar) to work.
• Baking powder, a self-contained mixture of sodium bicarbonate plus a solid acid (originally cream of tartar, a wine-making byproduct) plus a starch buffer, was the breakthrough that needed no acidic ingredient. In England, Alfred Bird created a version around 1843. In the United States, the Harvard chemist Eben Norton Horsford, working from the 1850s, developed a calcium-phosphate-based baking powder and, with partner George Wilson, founded the Rumford Chemical Works to manufacture it, commercializing baking powder as a mass product (American Chemical Society, “Development of Baking Powder” National Historic Chemical Landmark; Smithsonian, “The Great Uprising”). The later “baking powder wars” among American manufacturers (Royal, Rumford, Calumet) were fierce commercial and lobbying battles.

The effect was profound. Chemical leavening freed cooks from the slow, skill-intensive, temperamental process of yeast fermentation and made possible the entire category of quick breads and modern cakes (biscuits, cornbread, muffins, pancakes, layer cakes, soda bread) leavened in minutes. It democratized cake-baking, reshaped 19th-century domestic cookery (especially in America), and remains the backbone of home baking today.

Industrialization: yeast, sliced loaves, and the Chorleywood process

The industrial era standardized and accelerated bread on every front.

Purified baker’s yeast. Once fermentation science matured, yeast itself became a manufactured commodity. In the United States, Charles and Maximilian Fleischmann, Austro-Hungarian immigrants, introduced standardized compressed (cake) yeast, commercially from 1868, following their debut of the product and its showcase at the 1876 Philadelphia Centennial Exhibition (Fleischmann’s Yeast company history; Encyclopaedia Britannica). Reliable, uniform yeast decoupled bread-raising from sourdough culture-keeping and barm supply, enabling faster, more predictable, larger-scale production. Active dry yeast, developed to be shelf-stable, followed in the 20th century (notably during World War II, to supply troops).

Sliced bread. The Iowa jeweler-turned-inventor Otto Frederick Rohwedder built a working bread-slicing-and-wrapping machine after years of effort (an earlier prototype was destroyed by fire in 1917); it was first used commercially by the Chillicothe Baking Company in Chillicothe, Missouri, on July 7, 1928 (Rohwedder; Britannica, “Today in History”). Wrapped, pre-sliced loaves, soon promoted as “the greatest thing since sliced bread”, married perfectly with the electric pop-up toaster and became an icon of industrial convenience.

The Chorleywood Bread Process. The most consequential industrial baking innovation of the 20th century was developed at the British Baking Industries Research Association in Chorleywood, England, and announced in 1961. Its core trick is to replace the long bulk fermentation that develops dough by intense high-speed mechanical mixing (a large energy input in a few minutes), combined with oxidizing improvers, extra yeast, added fats, emulsifiers, and often lower-protein (and cheaper, home-grown British) wheat. The result is a soft, high-volume loaf produced from mixer to wrapped loaf in about three-and-a-half hours instead of many. The CBP made industrial bread dramatically cheaper and faster and today accounts for the large majority of factory bread in the UK and much of the Commonwealth. It is also the process most blamed by the artisan and “Real Bread” movements for the blandness, additive load, and poor digestibility associated with mass-market sliced bread.

Enrichment and fortification. As noted in the milling section, industrial roller-milled white flour’s nutritional deficits prompted government-mandated enrichment (thiamine, riboflavin, niacin, iron; later folic acid to prevent neural-tube defects), in the U.S. from 1941 and in the U.K. via wartime flour orders, making the fortified white loaf a public-health instrument as much as a food.

The modern era: artisan revival and the science of baking

Against industrial bread, the late 20th and early 21st centuries saw a powerful artisan revival. In Paris, Lionel Poilâne (building on his father Pierre’s bakery, founded 1932) became the movement’s figurehead, championing a large, naturally leavened, stone-ground country sourdough (pain Poilâne / miche) and turning it into an internationally shipped icon, proof that traditional method could be both principled and commercially serious. In the United States, the San Francisco sourdough tradition (its characteristic tang associated with Fructilactobacillus sanfranciscensis, first described in the 1970s) anchored an American strand of the revival. Chad Robertson of Tartine Bakery in San Francisco, through Tartine Bread (2010), popularized a high-hydration, long-fermented naturally leavened loaf that became the template for a global home-baker generation. The teacher-author Peter Reinhart (The Bread Baker’s Apprentice, 2001; Whole Grain Breads, 2007) codified technique (pre-ferments, extended fermentation, the “epoxy method” for whole grains) for a serious amateur audience.

Running alongside is a science-of-cooking movement that gave bakers mechanistic understanding rather than only inherited rules. Harold McGee’s On Food and Cooking (1984; revised 2004) brought food chemistry to a wide readership, explaining gluten, gelatinization, the Maillard reaction, and fermentation in accessible terms. Nathan Myhrvold’s Modernist Cuisine (2011) and Modernist Bread (2017) applied laboratory rigor, high-speed photography, and exhaustive testing to bread specifically. America’s Test Kitchen (from the 1990s) popularized the controlled-experiment approach to recipe development for home cooks. In parallel, the whole-grain and heritage-grain movements, reviving landrace and older wheats (einkorn, emmer, spelt, Turkey Red, Sonora), local stone-milling, and freshly milled flour, reconnected bakers to the botanical and nutritional story that roller milling had severed. The modern moment (vividly amplified during the 2020 pandemic sourdough boom) is thus defined by a self-conscious return to slow natural leaven, informed for the first time by a real understanding of the microbes and molecules that make it work.

Cross-cultural traditions: a wider world of baking

A European-centered narrative badly understates baking’s global scope. Several major traditions developed independently and remain living staples.

Middle Eastern, Central and South Asian flatbreads. The oldest continuous baking traditions are flatbreads baked in or against hot ovens and griddles. Pita (Levant/Eastern Mediterranean) puffs into a pocket from steam in a very hot oven. Lavash, a thin, soft, sometimes cracker-crisp flatbread of Armenia, Iran, and the Caucasus, is baked by slapping the rolled dough onto the wall of a tandoor/tonir; it is UNESCO-inscribed intangible cultural heritage. In South and Central Asia the tandoor tradition yields naan (leavened, often with yogurt or a bit of yeast/barm, baked stuck to the clay wall) and its unleavened griddle cousins roti/chapati cooked on a tawa. These clay-oven and griddle techniques are direct descendants of the ancient Near Eastern tannur.

East Asian steamed breads. In China, the wheat-based staple of the north is not baked in dry heat but steamed: mantou (plain steamed buns) and baozi (filled buns), leavened traditionally with a sourdough-like starter (lao mian) or now commercial yeast. Steaming, rather than oven-baking, is a distinct thermal technology, and it reminds us that “baking” in the strict sense was not the universal endpoint of grain-and-leaven cookery.

Mesoamerica. The Americas built a grain civilization on maize, not wheat, and the defining technology is nixtamalization: soaking and cooking corn in an alkaline solution (lime/cal or wood-ash lye), a process developed in Mesoamerica by roughly 1500–1000 BCE. Nixtamalization loosens the hull, improves grindability, and, crucially, liberates niacin and improves protein quality, preventing the pellagra that struck later populations who adopted maize without it. The resulting masa is patted into tortillas cooked on a comal (flat clay or metal griddle), an unleavened flatbread tradition parallel to the Old World’s. The European wheat-and-oven tradition arrived with the Spanish and eventually fused into Mexico’s celebrated pan dulce and panadería culture, a genuine Old-World/New-World hybrid.

Ethiopia and the Horn of Africa. Injera is a large, spongy, sourdough flatbread made preferentially from teff (Eragrostis tef), a tiny indigenous grain. The batter is naturally fermented for days, then poured onto a large clay griddle (mitad) and cooked with a lid so that escaping gas creates its characteristic honeycomb of “eyes.” It is simultaneously bread, plate, and utensil, one of the world’s most distinctive fermented-grain foods.

Northern Europe’s rye. In Scandinavia and the Baltic, cold-climate rye dominates, and because rye needs acid to bake well, the tradition is deeply sourdough-based: dense, dark, long-baked rye loaves (German Roggenbrot/pumpernickel, Danish rugbrød) and the thin, dried, long-keeping knäckebröd (crispbread), historically baked in batches and stored for months on poles across the ceiling. These are baking’s answer to short growing seasons and the imperative of preservation.

Taken together, these traditions show that the human response to grain converged on a common set of principles (grind, hydrate, often ferment, apply heat) while diverging into a remarkable diversity of grains (wheat, barley, rye, maize, teff, rice, sorghum) and thermal methods (clay-wall, griddle, steam, oven, ash). Baking is less a single invention than a family of parallel solutions to the same ancient problem: how to turn a hard, storable seed into food that people can digest, enjoy, and build a society around.

Contested and flagged claims